REVIEWS AND BOOK NOTICES. 677 
quite abruptly, as represented in the following cut showing it from 
e east. 
Just west of the Serra of Ereré is a short ridge, with the same 
trend and geological structure, called Aroxi. ‘This is followed by 
several still smaller ridges, apparently part of the same outcrop. 
Fig. 95. 
Serras of Ereré and Aroxi from the Southwest, 
The Serra of Paittina, near’ the igarapé of the same name, is 
composed of horizontal beds of the same sandstone as that of the 
Serra of Ereré, “so that the two serras probably form part of a 
synclinal fold.” The sandstones for ming the Serra of Ereré are 
well jointed and of unequal hardness. On weathering, they have 
assumed many curious forms, some of which are covered with 
Indian inscriptions and paintings. Fragments of silicified wood 
have been found in the stone, but they are too poorly preserved to 
admit of identification. Thus we have no paleontological evidence 
as to the age of these sandstones, which may be older or newer 
than those of the plain to the north. 
ooking northeastward from the Serra of Ereré, beyond the 
northern termination of the Monte-Alegre highlands, we see the 
Serra of Tauajuri, a “splendid, blue, mountain mass, which, with 
precipitous front, heaves its back against the horizon, like a giant 
Wave ready to break upon the level plains of Ereré, that lie spread 
Fig. 96. 
* 
Sketch looking northward from Serra of Ereré. 
Sut before us. While, northward from the hills (of Aroxi and 
Aracurt) stretches a belt of low, wooded ridges, skirting the 
campos on the west and north, apa bending round to close the 
circuit with Tauajuri.” 
The Serra of Tauajuri isa y sharp-crested ridge, exceedingly steep 
on the southern side, but sloping off at an angle of 10°-15° on the — 
